IAPT are good! And in terms of private counselling, another woman in this forum said her partner goes to actual addiction counselling, have you tried googling that?
She may be the stronger one and people say that about me but I’ve really struggled with all of this and haven’t wanted to say that to my partner in case it puts more stress on him and causes him to relapse.. maybe just let her know that there is help out there should you need it 🙂
Sounds like you’re doing all of the right things so keep it up! Also try looking for groups in your area such as Narcotics anonymous, they are really helping my partner!